If you want to play it safe, I'd take the VGF Studio points and add 15% per night. Assuming the bungalows sleep 8/9 and are more plush than the typical Two Bedroom villa, I'd estimate a minimum 50% upcharge over VGF Lake View 2B.
It's probably going to be 18-20 months before
point charts are published. And you can add a couple years worth of inflation on the cost of the points.
Also if you aren't an owner when Poly goes on sale, you won't get the lowest price if history holds. With VGF there was a price increase before they began selling to the general public.
It's pretty much the same dilemma every prospective owner faces. If there's another lower-priced resort that you also enjoy, you could consider buying there and resign yourself to staying at the Poly only when it's available at 7 months. Or you wait for the Poly and pay what is certain to be a very high asking price.